Release ASUS ZenWiFi ET8 Firmware version 3.0.0.4.388_25186 (2025/10/28)

[fruitcornbread]

Version 3.0.0.4.388_25186
49.24 MB
2025/10/28

This version of firmware is only applicable to ZenWiFi ET8 of HW Ver: 1.0, please check the product label before utilizing. You can check the hardware version from the product SN label or box label.

- Enhanced system stability.
- Enhanced input validation and refactored legacy string handling routines to ensure robust memory management.
- Addressed multiple security weaknesses in AiCloud service by enforcing strict credential verification, implementing robust file path validation, and hardening command execution logic to prevent unauthorized access and manipulation of system resources.
- Implemented comprehensive validation and expanded command filtering in the web history API.
- Fixed a privilege escalation vector in the IFTTT token exchange mechanism
- Strengthened input validation and directory handling in the VPN configuration upload interface.
- Fixed an issue that allowed certain user settings to be bypassed, improving overall user control and protection.

ZIP SHA-256 : C3426EF1C0100C760F9554E92D5D1525D1B7416DC92238DA87CC360CDACFE604
FW SHA-256 : 06db499aae57cfab57bc71bcc7e2133a98f2b8f581a2a48a4ded8248b297955a

Download: https://dlcdnets.asus.com/pub/ASUS/wireless/ZenWiFi_ET8/FW_ZENWIFI_ET8_300438825186.zip?model=ZenWiFi ET8
(You will need to copy the link and paste it in a browser for the link above to work.)

ASUS ZenWiFi ET8｜Whole Home Mesh WiFi System｜ASUS Global

AXE6600 tri-band WiFi 6E (802.11ax) whole-home mesh WiFi system, up to 5500 sq. ft. coverage, new 6 GHz band, Seven 160 MHz channels, 6 GHz and Ethernet backhaul, free VPN security, lifetime free internet security, AiMesh support, ASUS Router app for easy setup and management

www.asus.com

 

[opq]

Ever since the 3/2025 version 25138 most of my 6GHz clients are only connecting to 5GHz on secondary nodes. I was going to revert again but I do have a single device connecting at 6GHz to that secondary node, whereas before every capable device would stay on 6GHz…

 

[opq]

OK I spent the day playing with this new FW and wanted to share my data points in case it helps someone else.

I updated directly from the March FW, because a few of the releases between March and October made me lose 6GHz completely.

I did an in-place upgrade and at first, only one client would connect to 6GHz, the rest wouldn’t. I then changed the 6GHz transmit power from max to the middle, and then changed it back. I then used the AiMesh system reboot (not just the reboots that come with setting changes) to have the whole system come back online together.

After all of that:
* Clients (except 1) closest to a secondary AiMesh node still refuses to connect to 6GHz. On problematic clients I checked logs and it does see the 6GHz channels… so not sure what’s going on here.
* Clients closest to the main node are connecting to 6GHz according to the Client List pretty regularly. I did notice a bug in the Client List where some clients would say they are connected to 5GHz but at 2000Mbps speeds, and given the ET8’s specs, 5GHz maxes out at 1200Mbps, so I think this means 6GHz is actually working?

So just like post March firmware I’m having issues with secondary AiMesh nodes and 6GHz